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-- CA11003.A
--
-- Grant of Unlimited Rights
--
-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
-- unlimited rights in the software and documentation contained herein.
-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
-- this public release, the Government intends to confer upon all
-- recipients unlimited rights equal to those held by the Government.
-- These rights include rights to use, duplicate, release or disclose the
-- released technical data and computer software in whole or in part, in
-- any manner and for any purpose whatsoever, and to have or permit others
-- to do so.
--
-- DISCLAIMER
--
-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
-- PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- OBJECTIVE:
-- Check that a public grandchild can utilize its ancestor unit's visible
-- definitions.
--
-- TEST DESCRIPTION:
-- Declare a public package, public child package, and public
-- grandchild package and library unit function. Within the
-- grandchild package and function, make use of components that are
-- declared in the ancestor packages, both parent and grandparent.
--
-- Use the following ancestral components in the grandchildren library
-- units:
-- Grandparent Parent
-- Type X X
-- Constant X X
-- Object X X
-- Subprogram X X
-- Exception X X
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
-- 21 Dec 94 SAIC Modified procedure Create_File
-- 15 Nov 95 SAIC Update and repair for ACVC 2.0.1
--
--!
package CA11003_0 is -- Package OS
type File_Descriptor is new Integer;
type File_Mode is (Read_Only, Write_Only, Read_Write);
Null_File : constant File_Descriptor := 0;
Default_Mode : constant File_Mode := Read_Only;
File_Data_Error : exception;
type File_Type is tagged
record
Descriptor : File_Descriptor := Null_File;
Mode : File_Mode := Read_Write;
end record;
System_File : File_Type;
function Next_Available_File return File_Descriptor;
procedure Reclaim_File_Descriptor;
end CA11003_0; -- Package OS
--=================================================================--
package body CA11003_0 is -- Package body OS
File_Count : Integer := 0;
function Next_Available_File return File_Descriptor is
begin
File_Count := File_Count + 1;
return (File_Descriptor(File_Count));
end Next_Available_File;
--------------------------------------------------
procedure Reclaim_File_Descriptor is
begin
null; -- Dummy processing unit.
end Reclaim_File_Descriptor;
end CA11003_0; -- Package body OS
--=================================================================--
package CA11003_0.CA11003_1 is -- Child package OS.Operations
subtype File_Length_Type is Integer range 0 .. 1000;
Min_File_Size : File_Length_Type := File_Length_Type'First;
Max_File_Size : File_Length_Type := File_Length_Type'Last;
File_Duplication_Error : exception;
type Extended_File_Type is new File_Type with private;
procedure Create_File (Mode : in File_Mode;
File : out Extended_File_Type);
procedure Duplicate_File (Original : in Extended_File_Type;
Duplicate : out Extended_File_Type);
private
type Extended_File_Type is new File_Type with
record
Blocks : File_Length_Type := Min_File_Size;
end record;
System_Extended_File : Extended_File_Type;
end CA11003_0.CA11003_1; -- Child Package OS.Operations
--=================================================================--
package body CA11003_0.CA11003_1 is -- Child package body OS.Operations
procedure Create_File
(Mode : in File_Mode;
File : out Extended_File_Type) is
begin
File.Descriptor := Next_Available_File; -- Parent subprogram.
File.Mode := Default_Mode; -- Parent constant.
File.Blocks := Min_File_Size;
end Create_File;
--------------------------------------------------
procedure Duplicate_File (Original : in Extended_File_Type;
Duplicate : out Extended_File_Type) is
begin
Duplicate.Descriptor := Next_Available_File; -- Parent subprogram.
Duplicate.Mode := Original.Mode;
Duplicate.Blocks := Original.Blocks;
end Duplicate_File;
end CA11003_0.CA11003_1; -- Child package body OS.Operations
--=================================================================--
-- This package contains menu selectable operations for manipulating files.
-- This abstraction builds on the capabilities available from ancestor
-- packages.
package CA11003_0.CA11003_1.CA11003_2 is
procedure News (Mode : in File_Mode;
File : out Extended_File_Type);
procedure Copy (Original : in Extended_File_Type;
Duplicate : out Extended_File_Type);
procedure Delete (File : in Extended_File_Type);
end CA11003_0.CA11003_1.CA11003_2; -- Grandchild package OS.Operations.Menu
--=================================================================--
-- Grandchild subprogram Validate
function CA11003_0.CA11003_1.CA11003_3 (File : in Extended_File_Type)
return Boolean;
--=================================================================--
-- Grandchild subprogram Validate
function CA11003_0.CA11003_1.CA11003_3
(File : in Extended_File_Type) -- Parent type.
return Boolean is
function New_File_Validated (File : Extended_File_Type)
return Boolean is
begin
if (File.Descriptor > System_File.Descriptor) and -- Grandparent
(File.Mode in File_Mode ) and -- object and type
not ((File.Blocks < System_Extended_File.Blocks) or
(File.Blocks > Max_File_Size)) -- Parent object
then -- and constant.
return True;
else
return False;
end if;
end New_File_Validated;
begin
return (New_File_Validated (File)) and
(File.Descriptor /= Null_File); -- Grandparent constant.
end CA11003_0.CA11003_1.CA11003_3; -- Grandchild subprogram Validate
--=================================================================--
with CA11003_0.CA11003_1.CA11003_3;
-- Grandchild package body OS.Operations.Menu
package body CA11003_0.CA11003_1.CA11003_2 is
procedure News (Mode : in File_Mode;
File : out Extended_File_Type) is -- Parent type.
begin
Create_File (Mode, File); -- Parent subprogram.
if not CA11003_0.CA11003_1.CA11003_3 (File) then
raise File_Data_Error; -- Grandparent exception.
end if;
end News;
--------------------------------------------------
procedure Copy (Original : in Extended_File_Type;
Duplicate : out Extended_File_Type) is
begin
Duplicate_File (Original, Duplicate); -- Parent subprogram.
if Original.Descriptor = Duplicate.Descriptor then
raise File_Duplication_Error; -- Parent exception.
end if;
end Copy;
--------------------------------------------------
procedure Delete (File : in Extended_File_Type) is
begin
Reclaim_File_Descriptor; -- Grandparent
end Delete; -- subprogram.
end CA11003_0.CA11003_1.CA11003_2;
--=================================================================--
with CA11003_0.CA11003_1.CA11003_2; -- Grandchild Pkg OS.Operations.Menu
with CA11003_0.CA11003_1.CA11003_3; -- Grandchild Ftn OS.Operations.Validate
with Report;
procedure CA11003 is
package Menu renames CA11003_0.CA11003_1.CA11003_2;
begin
Report.Test ("CA11003", "Check that a public grandchild can utilize " &
"its ancestor unit's visible definitions");
File_Processing: -- Validate all of the capabilities contained in
-- the Menu package by exercising them on specific
-- files. This will demonstrate the use of child
-- and grandchild functionality based on components
-- that have been declared in the
-- parent/grandparent package.
declare
function Validate (File : CA11003_0.CA11003_1.Extended_File_Type)
return Boolean renames CA11003_0.CA11003_1.CA11003_3;
MacWrite_File,
Backup_Copy : CA11003_0.CA11003_1.Extended_File_Type;
MacWrite_File_Mode : CA11003_0.File_Mode := CA11003_0.Read_Write;
begin
Menu.News (MacWrite_File_Mode, MacWrite_File);
if not Validate (MacWrite_File) then
Report.Failed ("Incorrect initialization of files");
end if;
Menu.Copy (MacWrite_File, Backup_Copy);
if not (Validate (MacWrite_File) and
Validate (Backup_Copy))
then
Report.Failed ("Incorrect duplication of files");
end if;
Menu.Delete (Backup_Copy);
exception
when CA11003_0.File_Data_Error =>
Report.Failed ("Exception raised during file validation");
when CA11003_0.CA11003_1.File_Duplication_Error =>
Report.Failed ("Exception raised during file duplication");
when others =>
Report.Failed ("Unexpected exception in test procedure");
end File_Processing;
Report.Result;
end CA11003;
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